I have the N1 duals on my 91 N/A Rx-7 and was wondering which one headers or a race pipe from Bonez would give me the most power increase and how much would it increase by.

 

A Header will give you more power and torque. A header is designed much better than the stock exhaust manifold, so it will give power throughout the entire powerband. Why not get a header and then a straight pipe to take out the cats?

As for power gains, someone dyno'd before and after with a header awhile ago, Ill see if I can find the thread.

 

This might be of great interest to you:straight-pipe VS. header dyno

 

To get the best power increase - RB Header into a cat or a presilencer - then into your catback.
I gained about 20HP with that setup (still using the stock intake).
I gave back maybe 5HP to gain some low & mid torque when I switched to full dual.
The pics & sound bite are linked in my sig below.

 

im running a RB header and presilencer u DO feel a difference probly about 20HP!! i was shocked after i installed it much better response and all around!! i would gave my thunmbs up for this setup!!

 

jgrts20


In your sig it sayts (true duals) but yuo have a collected system????

 

what r u talking about the true duals r the twins coming out the back!!

 

lol



True duals as far as I know and 99% of the people I talk to is an UNCOLECTED system like sureshots or mine

Reason being they are a real dual exaust that provides a separate pipe for each exhaust port.

Santiago

 

um that doesnt sound right, whatever!! =P

 

Well its nothing really just that since I got here that is what I have know that term to mean. Oh well. Just expect people to think you are talking about what I said when you mention true duals.

Santiago

 

Yes, true duals are two pipes from the header back, uncollected. There is no y-pipe in a true dual system.

 

True...the True Dual Exhaust system is uncollected in anyway (thus I sent you the PM...that's why I questioned what you have...the Dynomax).

 

Can U post a pic of a "true dual Exhaust" set up??? I am curious as to what it looks like against the Stock set up.

Shang

 

Here is a cheap dual setup.
header kit $80
silencers 2 x $20
muffler shop cutting & welding $100
bomb muflers 2 x $20
total $260


The stereo sound of true duals - priceless

Click on the link in my sig below..

 

True duals...does a body good . Sureshot...you are an inspiration to us all .

 

Here is a short vid - from inside.
link to short video